Metal cable haulage and hoisting appliance



g- 1961 J. PERSIAUX 2,995,339

METAL CABLE HAULAGE AND HOISTING APPLIANCE Filed May 1, 1958 2Sheets-Sheet 1 INVENTOR.

JEAN PERSIAUX W mg A TTORN E Y Aug. 8, 1961 J. PERSIAUX METAL CABLEHAULAGE AND HOISTING APPLIANCE 2 Sheets-Sheet 2 Filed May 1, 1958INVENTOR.

o JEAN PERSIAUX i l I I III'II I I I I I I I I1 |l| A TTORNE Y UnitedStates Patent 2,995,339 METAL CABLE HAULAGE AND HOISTING APPLIANCE JeanPersiaux, Lannoy, France, assignor to Societe dExploitations des Brevetset Appareils Tirfor, dite Tirfor S.A., Paris, France Filed May 1, 1958,Ser. No. 732,225 Claims priority, application France May 4, 1957 3Claims. (Cl. 254-76) A first purpose of the invention is to produce ametal cable haulage and hoisting appliance; enabling the users effort tobe adapted at any moment to the displaced load.

Another purpose of the invention is to secure a rapid advance of thehauling cable while working with a small load.

Another purpose of the invention is to produce a haulage and hoistingappliance whose speed can be varied while remaining under load.

As a non-limitative illustration the accompanying drawings represent adevice according to the invention, in which- FIG. 1 is a view inelevation of the device shown with the front half of the housingremoved,

FIG. 2 is a perspective View of the eccentric, and

FIG. 3 is a longitudinal sectional view of the device.

The hauling cable enters the appliance in question by a guide 12 andthen passes between two mobile jaws 13 and 14.

It will be hereafter supposed that the device is movable along a cablesecured at a fixed point and that said device is pulling a load aflixedto the device. On the contrary the device could be maintained fixed andcould be used for pulling the cable to which the load would be secured.It may further be acting on a cable assuming any position between thehorizontal and vertical positions.

Movable jaws 13 and 14 are known in design and comprise in a mannersimilar as the one described in the US. patent to Faure, 2,585,101, twoclamping blocks 31-32 each comprising on each side two half-pins 33engaging corresponding openings in levers 34, 35 and 36, 37 arranged insymmetrical pairs on each side of clamping blocks 31-32. These pairs oflevers respectively pivot on shafts 3$39 and 40- 41 connecting pairs ofsymmetrical plates 42 and 43 located inside housing 44 which comprisesmechanism assembly.

In each jaw levers 35 and 36 have an extending arm supporting pins 53and 54 which connect them respectively to a lever 17 and to a link 18constituting the backward motion mechanism of the device.

Each jaw comprises further a spring 45 or 46 located inside tube 47 or48 and having one end resting on a fixed pin 49 or 59 interconnectingthe plates of each jaw and having the other end in contact with a pin 51or 52 integral with pair of levers 35 or 37. These springs tend to urgetowards the right the levers and clamping blocks assembly of each jaw,said clamping blocks being forced to slightly grip cable C. On thecontrary, when the jaws are moved towards the left by means of thelevers hereafter described, the action of the openings in the levers onthe corresponding half-pins 33 tends to release cable C. However, whenthe device is in operation, the two jaws always move in oppositedirections, getting near each other or away from each other, in suchmanner that there is always one jaw gripping the cable while the otheris sliding relatively to said cable.

In the case considered above in which the device to which a load issecured is moving on the cable towards the right, the two jaws areactuated by a linkage comprising, a shaft 15 mounted in cylindricalbearings provided in the housing and to which double crank 1 is secured.The two jaws are connected to crank 1 by means of, in the case of jaw13, a connecting rod 15' pivotally mounted at one end on the side of jaw13 by means of pin 55 and, at the other end, connected by means of pin56 to one end of crank 1.

In the case of jaw 14, a connecting rod 16 pivotally mounted at one endon the side of jaw 14 by means of pin 57 and, at the other end,connected by means of pin 53 to the other end of crank 1.

To ensure the displacement of the device towards the left relatively tothe "cable, the two jaws 13* and 14 are controlled by lever \17 which,on one hand, is connected to levers 35 of jaw 14 by means of pin 53 and,on the other hand, is connected to levers 36 of jaw 13 by means of pin54, a link 18 and pin 60*.

Lever 17 pivots around pin '19 and, when moved in the directioncorresponding to the anchorage of the device, will cause the opening ofjaw 14 and the closing of jaw 13.

The connecting rod 18 is made so as to have two notches 2t and 21whereby it respectively abuts at the end of the top stroke and the endof the bottom stroke, on the oscillation pivot of. the lever 17controlling the movement, thus preventing the two jaws from strikingagainst each other when descending.

The double crank .1 which controls the movement of the jaws is itselfcontrolled, according to the present invention, by a connecting rod 2connected to a lever 7 the effective length of which is variable bymeans of pivot pin 2 The variation of the effective length of lever 7 isfurnished by a multiple position eccentric located in bore 7 provided inlever 7. The eccentric is provided on either side with two cylindricalpins bearing studs 3 engaging corresponding openings provided in thewalls of the housing and comprises a central portion 3 which fits into'bore 7 It is the axis of extending pins 3 which constitutes the axis ofthe eccentric and the pivot around which lever 7 oscillates.

According to one possible embodiment of the invention represented by thedrawings, central portion 3 of the eccentric is provided with radialapertures 3 for receiving the end of a finger 4 housed inside the lever.

It is obvious that the circumferential displacement of the cylindricalbearings 3 in relation to the axis of the bore 7 provided in the body ofthe lever 7, determines a variation in the length from center to center3 2 and consequently, of the effective length lever 7. This lever has alongitudinal hole or passage 7 in which the finger 4 engages that has arod 4 A retaining part 9 mounted at the top end of the lever 7, actsboth for retaining a spring 10 and guiding the rod 4 of the finger 4.The rod 4 of the finger 4 is provided with a button 5 at its top end,enabling it to be actuated.

With the haulage appliance either at rest or under load, the operatorcan, by acting on the button 5-, i.e., pulling on the rod 4 extended bythe finger 4, bring out the end of this finger 4 from the body of theeccentric 3 and by action on a means such as a cotter pin 11, determinethe rotation of the eccentric unit 3, toobtain the introduction of theend of the finger 4 into an aperture 3 determining an angulardisplacement of the lever, this displacement being selected by theoperator.

The purpose of the spring 10 is to keep the finger 4 in position in oneof the apertures 3 of the body 3 of the eccentric.

The control means such as the cotter pin is obviously placed in anaccessible manner for the operator.

It goes without saying that the invention is not restricted to theexamples of embodiment precisely described and shown and from whichother alternativm can be produced without going outside the scope of theinvention for that purpose.

For instance, the locking of the eccentric can be effected by means of akey or similar device.

What I claim is:

1. In a metal cable hauling and hoisting device having two jaws movablein opposite directions and ensuring the movement of the devicerelatively to the cable and a double crank connected to said jaws: acontrol lever coupled with said crank and provided near its lower endwith a cylindrical bore; an eccentric including a cylindrical centralportion rotatably mounted in the cylindrical bore of the control lever,and two cylindrical hearing studs acting as the pivot axis of thecontrol lever, said cylindrical central portion being provided with aplurality of peripheral and radial apertures; and a locking finger forlocking the eccentric relatively to the control lever, said lockingfinger being housed in a longitudinal passage of the control lever withthe end of said finger engaging one of the radial apertures of thecentral portion of the eccentric.

2. In a metal cable hauling and hoisting device having two jaws movablein opposite directions and ensuring the movement of the devicerelatively to the cable and a double crank connected to said jaws: acontrol lever coupled with said shank and provided near its lower endwith a cylindrical bore; an eccentric including a cylindrical centralportion rotatably mounted in the cylindrical bore of the control lever,and two cylindrical bearing studs acting as the pivot axis for thecontrol lever, said cylindrical central portion being provided with aplurality of peripheral and radial apertures; a locking finger forlocking the eccentric relatively to the control lever, said lockingfinger being housed in a longitudinal passage of the control lever withthe end of said finger engaging one of the radial apertures of thecentral portion of the eccentric; and a spring housed in thelongitudinal bore of the control lever and urging the locking fingertoward the eccentric.

3. In a metal cable hauling and hoisting device having two jaws movablein opposite direction and ensuring the movement of the device relativelyto the cable and a double crank connected to said jaws: a control levercoupled with said crank and provided near its lower end with acylindrical bore; an eccentric including a cylindrical central portionrotatably mounted in the cylindrical bore of the control lever, and twocylindrical hearing studs acting as the pivot axis of the control lever,said cylindrical central portion being provided with a plurality ofperipheral and radial apertures; a locking finger for locking theeccentric relatively to the control lever, said locking finger beinghoused in a longitudinal passage of the control lever with the end ofsaid finger engaging one of the radial apertures of the central portionof the cccentric; a spring housed in the longitudinal bore of thecontrol lever and urging the locking finger toward the eccentric; andsecuring means located at the upper end of the lever for holding saidspring in position.

References Cited in the file of this patent UNITED STATES PATENTS130,878 Stiles Aug. 27, 1872 135,380 Stiles Jan. 28, 1873 1,350,994Gorman Aug. 24, 1920 2,585,101 Faure Feb. 12, 1952

